CN113101463A - Puncture-proof injection needle and injector comprising same - Google Patents
Puncture-proof injection needle and injector comprising same Download PDFInfo
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- CN113101463A CN113101463A CN202110281605.2A CN202110281605A CN113101463A CN 113101463 A CN113101463 A CN 113101463A CN 202110281605 A CN202110281605 A CN 202110281605A CN 113101463 A CN113101463 A CN 113101463A
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- needle
- puncture
- proof
- injection
- sleeve
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a puncture-proof injection needle which comprises a puncture needle (1), a needle seat (2) and a puncture-proof sleeve (3) which are coaxially arranged, wherein the front end of the needle seat (2) is provided with a first bulge structure (21). The puncture-proof function of the puncture-proof injection needle is safe and reliable, and the puncture-proof injection needle can be matched with the existing injection cylinders of most models for use, so that the universality is strong; compared with other puncture-proof injection needles, the product has simple structure, low cost and better market popularization prospect.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a puncture-proof injection needle and an injector containing the same.
Background
The most commonly used medical means is the injection of medication, and the most frequently used medical devices are syringes equipped with injection needles. In the using process, medical care personnel are punctured by the injection needle, although slight skin and flesh damage happens, serious consequences such as AIDS, viral hepatitis and other diseases can be caused by the puncture-proof injection needle, and therefore the medical care personnel expect the popularization of the puncture-proof injection needle. The popularization of puncture-proof syringes depends on the spread of medical institutions on the one hand, and on the other hand, the product cost is required to be as low as possible and the operation is required to be as close to that of the traditional syringes as possible so as to be convenient for scale and standardized use. At present, various types of puncture-proof syringes are put into trial at home and abroad, such as: WO2005030290a2 discloses a safety needle assembly comprising a hub having a proximal end and a distal end, a piercing needle extending from the distal end of the hub, a collar rotatably mounted about the distal end of the hub; a needle shield cap is pivotally connected to the collar to cover the tip of the piercing needle. In such solutions, the needle cap occupies the lateral space of the needle before rotating to cover the needle tip, which is inconvenient for the injection operation, and at the same time, is easy to be mishandled and turned to the patient injection position during injection. CN106581824B discloses a product for preventing prick, which is composed of a plurality of sliding parts and a prick-proof sleeve for shielding a steel needle to achieve the effect of preventing prick. In view of this, the development of the puncture-proof injector which can effectively prevent puncture and has low cost has important significance for the popularization and the promotion of the products.
Disclosure of Invention
The invention aims to provide a puncture-proof injection needle and a syringe containing the same. The puncture-proof sleeve can slide out of the needle seat and shield the needle tip after the injection is finished. The product has simple structure, easy manufacture and use and low cost, and is very favorable for popularization of the product.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the utility model provides a prevent stinging syringe needle, includes puncture needle, needle file and the sheath of preventing stinging that sets up with coaxial mode, its characterized in that:
the puncture needle is fixedly connected with the needle seat in a way that the rear end of the puncture needle is embedded into the front end of the needle seat;
the front end of the needle base is coaxially provided with a first protruding structure, the first protruding structure is in an inverted round table shape, and at least part of the first protruding structure protrudes out of the side face of the needle base in the radial direction;
the side surface of the rear end of the needle seat is provided with a locking structure;
the front end of the puncture-proof sleeve is closed, a through hole for a puncture needle to pass through is arranged in the center of the end face, and an inverted circular truncated cone structure which protrudes backwards is arranged on the inner side of the end face in a coaxial mode with the through hole;
the rear end of the puncture-proof sleeve is an open end, and the inner surface of the rear end is provided with a second convex structure which is convex inwards;
the inner diameter of the puncture-proof sleeve is consistent with the outer diameter of the front end face of the first bulge structure;
in an initial state, the puncture-proof sleeve is sleeved outside the needle base, and is fixedly connected with the needle base through the matching of the second bulge structure and the locking structure, so that the needle base is integrally shielded inside; the needle point of the puncture needle passes through the through hole of the puncture-proof sleeve and is exposed out of the puncture-proof sleeve.
In the puncture-proof injection needle, the improvement point is mainly embodied in the first bulge structure on the needle seat and the puncture-proof sleeve with a specific structure at the front end and the rear end. The fixed connection between the needle holder and the piercing needle can be designed and implemented with reference to the prior art, which is also easy to determine and operate for the person skilled in the art, if the dimensions of the needle holder and/or the piercing needle need to be adjusted due to the introduction of the puncture-proof sheath. In the present invention, unless otherwise stated, the front end of the puncture-preventing sleeve and the needle holder are both the end close to the needle of the puncture needle, and the rear end is the opposite end.
The front end of the needle base is provided with a first protruding structure which is in the shape of an inverted round table. The diameter of the first projection arrangement gradually decreases from the front face to the rear face resulting in the side face being inclined relative to the shaft. As a preferred embodiment, the oblique side of the first projection arrangement is inclined at an angle of between 45-70 ° to the axis. The purpose of designing the first bump structure in this way is mainly two ways: when the first protruding structure is used as a limiting structure, the first protruding structure can play a role in blocking when the puncture-proof sleeve slides forwards along the axial direction until the second protruding structure moves to the front end of the needle base, so that the puncture-proof sleeve is prevented from being separated from the needle base; secondly, through the design of the inclined side surface, when the second protruding structure is in lap joint with the first protruding structure, the puncture-proof sleeve can swing within a certain angle range relative to the shaft, and non-coaxial lap joint is formed between the puncture-proof sleeve and the needle seat, so that the needle point of the puncture needle enters the puncture-proof sleeve and then staggers the through hole on the front end surface of the puncture-proof sleeve, and the puncture needle is prevented from penetrating out of the through hole due to the initially arranged coaxial structure when the puncture-proof sleeve returns. It will be readily appreciated that at least a portion of the angled side of the first projecting structure should project radially beyond the side of the hub. In a preferred embodiment, the inclined side of the first projecting structure projects completely radially beyond the side of the needle seat.
The first bulge structure can be integrally formed as a part of the needle seat in the process of manufacturing the needle seat, and can also be fixedly connected to the front end of the needle seat in a bonding mode and the like after being separately manufactured and formed.
The side surface of the rear end of the needle seat is provided with a locking structure. In the initial state, the puncture-proof sleeve can be fixedly connected to the needle base through the matching (such as clamping, screwing and other modes) between the locking structure and the second bulge structure; after the injection is finished, the fixation between the puncture-proof sleeve and the needle seat can be released through simple operation. In a preferred embodiment, the locking structure is a raised external thread or tab and is annularly disposed along the rear end face of the hub.
The puncture-proof sleeve is a core component for realizing the puncture-proof purpose of the puncture-proof injection needle. The puncture-proof sleeve is fixedly connected to the needle base in an initial state, and the needle base is integrally shielded inside; after the injection is finished, the fixed connection between the puncture-proof sleeve and the needle seat is removed, and the puncture-proof sleeve can slide forwards along the axial direction until the second protruding structure is in lap joint with the first protruding structure at the front end of the needle seat and the puncture needle is integrally contained in the puncture-proof sleeve.
The inner side of the front end face of the puncture-proof sleeve is provided with an inverted circular truncated cone structure which protrudes backwards in a mode of being coaxial with the through hole. When the needle point of the puncturing needle retreats into the puncture-proof sleeve and the non-coaxial type lap joint is formed between the puncture-proof sleeve and the needle seat, the inverted circular truncated cone structure can prevent the needle point from approaching the through hole, so that the possibility that the puncturing needle penetrates out of the through hole again is further reduced.
The inner surface of the back end of the puncture-proof sleeve is provided with a second convex structure. In an initial state, the second bulge structure is matched with the locking structure to realize the fixed connection between the puncture-proof sleeve and the needle seat; after the injection is finished, the second protruding structure is released from fixed connection and slides towards the front end of the needle base, and then is matched with the first protruding structure on the needle base, so that the purpose of limiting and non-coaxial type lap joint is achieved. In a preferred embodiment, the second male formation is a male internal thread and is adapted to mate with the locking formation.
It is easy to understand that the axial length between the front end surface of the puncture-proof sleeve and the second protruding structure should be greater than the length of the puncture needle exposed out of the needle seat, so as to ensure that the puncture-proof sleeve can accommodate the needle tip of the puncture needle in the overlapping state.
The stab-resistant sheath is preferably an integrally formed member in view of the convenience of manufacturing process and assembly. As an alternative embodiment, the puncture-proof sleeve can also be an assembly of several components. Illustratively, the puncture-proof sleeve can comprise a first pipe split body and a second pipe split body, wherein the inner diameters of the first pipe split body and the second pipe split body are consistent with the outer diameter of the front end face of the first protruding structure; the front end of the first pipe split body is closed, a through hole for a puncture needle to penetrate through is formed in the center of the end face, and an inverted circular truncated cone structure protruding backwards is arranged on the inner side of the end face in a coaxial mode with the through hole; the second pipe is divided into a tubular structure with two open ends, and a second protruding structure protruding inwards is arranged on the inner surface of the rear end; the rear end of the first pipe split body and the front end of the second pipe split body are provided with connecting structures (such as buckles, threads and the like) corresponding to each other, so that the first pipe split body and the second pipe split body can be fixedly connected with each other to form a complete puncture-proof sleeve. Preferably, the axial length of the second tube division body is smaller than the axial length between the first projection structure and the locking structure, so that when the second tube division body is fixedly connected to the needle seat, the front end of the needle seat including the first projection structure can be exposed.
As a preferred embodiment, the anti-prick injection needle of the present invention further comprises a cap. In the initial state, the protective cap is sleeved on the puncture-proof sleeve to shield the puncture needle exposed out of the puncture-proof sleeve.
Knowing the above-described configuration of the anti-prick injection needle of the present invention, it is easy for a person skilled in the art to determine how to make the injection, and the person can make a flexible choice by referring to the prior art, which is not described herein in detail.
With the above-described configuration of the anti-prick injection needle of the present invention in mind, it will also be readily apparent to those skilled in the art how to use the anti-prick injection for the purpose of preventing a pricked needle from being injured by the pricked needle. By way of non-limiting and exemplary use, the following steps may typically be included:
(1) the joint of the puncture-proof injection needle and the injection tube is screwed and fixed through the cavity of the needle seat;
(2) removing the protective cap, and performing injection operation according to the conventional flow of the injector;
(3) after the injection is finished, the puncture-proof sleeve is rotated to remove the fixed connection between the puncture-proof sleeve and the needle seat, and the puncture-proof sleeve slides forwards along the axial direction until the second bulge structure is lapped with the first bulge structure at the front end of the needle seat, and at the moment, the needle tip of the puncture needle enters the puncture-proof sleeve;
(4) the anti-puncturing sleeve is controlled to swing a certain angle relative to the shaft by depending on the inclined side structure of the first bulge structure so that the needle point of the puncturing needle is staggered with the through hole on the front end face of the anti-puncturing sleeve. At the moment, the anti-puncturing sleeve and the needle seat are in a non-coaxial lap joint state, and the puncturing needle can be prevented from penetrating out of the through hole due to the initially-arranged coaxial structure when the anti-puncturing sleeve returns. Thus, the purpose of preventing puncture is achieved.
On the basis of the puncture-proof injection needle, the invention also provides a puncture-proof injector with a detachable needle, which comprises the puncture-proof injection needle and an injection cylinder with a joint.
On the other hand, the invention also provides a puncture-proof injector with a fixed needle, which comprises the puncture-proof injection needle and is characterized in that: the needle holder is characterized by also comprising an injection tube, and the rear end of the needle holder is integrally and fixedly connected to the injection tube.
Compared with the prior art, the beneficial effects of the invention are mainly embodied in the following aspects:
(1) medical personnel use and prevent that thorn syringe needle and syringe do not have different with traditional syringe when carrying out the injection operation, prevent that the existence of thorn cover can not have any interference to the injection operation to follow-up easy operation, safety after the injection is ended can be accomplished with the help of gravity one hand after removing the fixed connection of preventing thorn cover and needle file.
(2) After the use operation is finished, the needle tip is completely shielded in the puncture-proof sleeve and cannot penetrate out again, and the puncture-proof sleeve cannot be separated from the needle base. Through simple structural design, all can reach the effect of preventing stinging safely under various circumstances, prevent stinging function safe and reliable.
(3) On the basis of the structure of the traditional injection needle, the invention only needs to be provided with the puncture-proof sleeve and the first bulge structure. Overall structure is simple, and easy manufacturing and use compare in other puncture-proof syringe needles, and the cost reduces by a wide margin, is favorable to marketing.
(4) The puncture-proof injection needle can be matched with most types of existing injection cylinders for use, and has good universality.
Drawings
FIG. 1 is a cross-sectional view of an initial state of the anti-prick injection needle according to the embodiment;
FIG. 2 is a schematic cross-sectional view of a removable needle anti-puncture syringe;
FIG. 3 is a schematic cross-sectional view illustrating the puncture-proof status of the puncture-proof needle after use according to the embodiment;
fig. 4 is a sectional view of the needle-fixed stab-resistant syringe.
The reference signs are: 1. puncturing a needle; 2. a needle seat; 21. a first bump structure; 22. a fin; 3. a puncture-proof sleeve; 31. the first pipe is split; 32. the second pipe is split; 33. a through hole; 34. an inverted frustum structure; 35. an internal thread; 4. a protective cap; 5. an injection tube; 51. and (4) a joint.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Examples
As shown in figure 1, the puncture-proof injection needle comprises a puncture needle 1, a needle base 2, a puncture-proof sleeve and a protective cap 4 which are coaxially arranged.
Wherein, the puncture needle 1 is fixedly connected with the needle seat 2 in a way that the rear end thereof is embedded into the front end of the needle seat 2.
The front end of the needle seat 2 is fixedly connected with a first protruding structure 21 in a coaxial manner, the first protruding structure 21 is in a shape of an inverted circular truncated cone with a wide upper part and a narrow lower part, the inclined angle of the inclined side surface of the first protruding structure relative to the shaft is about 60 degrees, and about one half of the inclined side surface protrudes out of the side surface of the needle seat 2 in the radial direction. The rear end side of the needle holder 2 is annularly provided with a raised fin 22.
The puncture-proof sleeve 3 is composed of a first pipe split body 31 and a second pipe split body 32, and the inner diameters of the first pipe split body and the second pipe split body are consistent with the outer diameter of the front end face of the first protruding structure 21. The front end of the first tube split body 31 is closed, a through hole 33 through which the puncture needle 1 passes is arranged at the center of the end face, and an inverted circular truncated cone structure 34 which protrudes backwards is arranged on the inner side of the end face in a manner of being coaxial with the through hole 33; the second pipe split body 32 is a tubular structure with two open ends, and the inner surface of the rear end is provided with an internal thread 35 which protrudes inwards and is matched with the fin 22; the rear end of the first pipe split body 31 and the front end of the second pipe split body 32 are provided with corresponding buckles, and the first pipe split body and the second pipe split body are fixedly connected through buckling to form the complete puncture-proof sleeve 3.
The axial length between the front end surface of the puncture-proof sleeve 3 and the internal thread 35 is larger than the length of the puncture needle 1 exposed out of the needle seat 2.
In an initial state, the puncture-proof sleeve 3 is sleeved outside the needle base 2, the fixed connection between the puncture-proof sleeve 3 and the needle base 2 is realized through the screwed connection of the internal thread 35 and the wing pieces 22, and the whole needle base 2 is shielded inside; the needle point of the puncture needle 1 passes through the through hole 33 of the puncture-proof sleeve 3 and is exposed out of the puncture-proof sleeve 3; the protective cap 4 is sleeved on the puncture-proof sleeve 3 and shields the puncture needle 1 exposed out of the puncture-proof sleeve 3.
Compared with the traditional injection needle, the puncture-proof injection needle is only provided with the first bulge structure 21 and the puncture-proof sleeve 3 which have specific structures, the structural change is small, the interference on the conventional injection operation is avoided, the subsequent operation after the injection is finished is simple, and the puncture-proof function is safe and reliable.
The use of the puncture-preventing injection needle of the present invention can be performed, for example, by the following steps:
(1) the syringe 5 is held by one hand, the puncture preventing sheath 3 of the puncture preventing injection needle is held by the other hand, the connector 51 of the syringe 5 is inserted into the cavity of the needle holder 2, and the syringe is screwed down, so that the puncture preventing injector shown in fig. 2 is obtained.
(2) The protective cap 4 is removed, and the liquid medicine is extracted and injected according to the injection flow of the conventional syringe. In this link, the puncture-proof sleeve 3 is always fixedly connected with the needle base 2, and the whole operation process cannot be interfered.
(3) After the injection is finished, the puncture preventing sleeve 3 is rotated to release the fixed connection between the puncture preventing sleeve 3 and the needle base 2, and then the injection tube 5 is held by hand to enable the needle point of the puncture preventing injector to face downwards. At this time, under the action of gravity, the puncture-proof sleeve 3 naturally slides downwards along the axial direction until the internal thread 35 is overlapped with the first bulge structure 21 at the front end of the needle base 2, and meanwhile, the needle point of the puncture needle 1 enters the puncture-proof sleeve 3.
(4) The syringe barrel 5 is held in the hand and the anti-prick syringe is converted from a needle point facing downwards to a needle point facing obliquely downwards (e.g. 45 deg.). At this time, under the action of gravity, the front end face of the puncture-proof sleeve 3 sags, so that the non-coaxial lap joint is formed between the puncture-proof sleeve 3 and the needle base 2, and the needle point of the puncture needle 1 is staggered with the through hole 33 on the front end face of the puncture-proof sleeve 3.
The anti-puncturing sleeve 3 and the needle base 2 are in a non-coaxial lap joint state, so that the puncturing needle 1 can be prevented from penetrating out of the through hole 33 due to a primary coaxial structure when the anti-puncturing sleeve 3 retracts. At the same time, the rounded plateau formation 34 can hinder the needle tip from approaching the through-opening 33, thereby further reducing the likelihood of the piercing needle 1 re-emerging from the through-opening 33. Subsequently, even if the needle tip is directed upward as shown in fig. 3, the piercing needle 1 cannot pass through the through hole 33. Thus, the purpose of preventing puncture is achieved.
Fig. 4 shows a needle-fixed, puncture-proof syringe, which differs from the structure of the puncture-proof syringe of fig. 2 in that: the back end of the needle stand 2 is integrally and fixedly connected with the injection tube 5.
The anti-puncturing function of the anti-puncturing injection needle is safe and reliable, and the anti-puncturing injection needle can be matched with the existing injection cylinders of most models, so that the anti-puncturing injection needle is strong in universality; compared with other puncture-proof injection needles, the invention has the advantages of simple structure, low cost and better market popularization prospect.
The above embodiments have mainly described the basic principles and main features of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (13)
1. The utility model provides a prevent stinging syringe needle, includes puncture needle, needle file and the sheath of preventing stinging that sets up with coaxial mode, its characterized in that:
the puncture needle is fixedly connected with the needle seat in a way that the rear end of the puncture needle is embedded into the front end of the needle seat;
the front end of the needle base is coaxially provided with a first protruding structure, the first protruding structure is in an inverted round table shape, and at least part of the first protruding structure protrudes out of the side face of the needle base in the radial direction;
the side surface of the rear end of the needle seat is provided with a locking structure;
the front end of the puncture-proof sleeve is closed, a through hole for a puncture needle to pass through is arranged in the center of the end face, and an inverted circular truncated cone structure which protrudes backwards is arranged on the inner side of the end face in a coaxial mode with the through hole;
the rear end of the puncture-proof sleeve is an open end, and the inner surface of the rear end is provided with a second convex structure which is convex inwards;
the inner diameter of the puncture-proof sleeve is consistent with the outer diameter of the front end face of the first bulge structure;
in an initial state, the puncture-proof sleeve is sleeved outside the needle base, and is fixedly connected with the needle base through the matching of the second bulge structure and the locking structure, so that the needle base is integrally shielded inside; the needle point of the puncture needle passes through the through hole of the puncture-proof sleeve and is exposed out of the puncture-proof sleeve.
2. The puncture-resistant injection needle according to claim 1, wherein: the oblique side of the first projection arrangement is inclined at an angle of between 45-70 deg. to the axis.
3. A puncture-proof injection needle according to claim 1 or 2, characterized in that: the inclined side surface of the first bulge structure completely bulges out of the side surface of the needle seat in the radial direction.
4. The puncture-resistant injection needle according to claim 1, wherein: the first bulge structure is integrally formed as a part of the needle base in the process of manufacturing the needle base, or is separately manufactured and formed and then fixedly connected to the front end of the needle base.
5. The puncture-resistant injection needle according to claim 1, wherein: the locking structure is a raised external thread or a wing piece and is annularly arranged along the side surface of the rear end of the needle seat.
6. A puncture resistant needle according to claim 1 or 5, wherein: the second raised structure is raised internal threads and is matched with the locking structure.
7. The puncture-resistant injection needle according to claim 1, wherein: the axial length between the front end surface of the puncture-proof sleeve and the second bulge structure is larger than the length of the puncture needle exposed out of the needle seat.
8. The puncture-resistant injection needle according to claim 1, wherein: the anti-prick sleeve comprises a first pipe split body and a second pipe split body, and the inner diameters of the first pipe split body and the second pipe split body are consistent with the outer diameter of the front end face of the first protruding structure; the front end of the first pipe split body is closed, a through hole for a puncture needle to penetrate through is formed in the center of the end face, and an inverted circular truncated cone structure protruding backwards is arranged on the inner side of the end face in a coaxial mode with the through hole; the second pipe is divided into a tubular structure with two open ends, and a second protruding structure protruding inwards is arranged on the inner surface of the rear end; the rear end of the first pipe split body and the front end of the second pipe split body are provided with connecting structures corresponding to each other, so that the first pipe split body and the second pipe split body can be fixedly connected with each other to form a complete puncture-proof sleeve.
9. The puncture-resistant injection needle according to claim 1, wherein: the axial length of the second pipe split body is smaller than the axial length between the first protruding structure and the locking structure.
10. The puncture-resistant injection needle according to claim 1, wherein: the puncture needle protection device further comprises a protective cap, wherein in an initial state, the protective cap is sleeved on the puncture-proof sleeve and shields the puncture needle exposed out of the puncture-proof sleeve.
11. A method of using the puncture resistant injection needle of any one of claims 1 to 10, comprising the steps of:
(1) the joint of the puncture-proof injection needle and the injection tube is screwed and fixed through the cavity of the needle seat;
(2) performing injection operation according to the conventional flow of the injector;
(3) after the injection is finished, the fixed connection between the puncture-proof sleeve and the needle seat is released, the puncture-proof sleeve slides forwards along the axial direction until the second convex structure is lapped with the first convex structure at the front end of the needle seat, and at the moment, the needle tip of the puncture needle enters the puncture-proof sleeve;
(4) the anti-puncturing sleeve is controlled to swing a certain angle relative to the shaft by depending on the inclined side structure of the first bulge structure so that the needle point of the puncturing needle is staggered with the through hole on the front end face of the anti-puncturing sleeve, and the anti-puncturing sleeve and the needle seat are in a non-coaxial type lap joint state at the moment, so that the puncturing needle can be prevented from penetrating out of the through hole due to the initially arranged coaxial structure when the anti-puncturing sleeve returns.
12. A detachable needle anti-prick syringe comprising the anti-prick injection needle according to any one of claims 1 to 10 and a cartridge having a joint.
13. A needle-fixed, puncture-proof syringe comprising the puncture-proof needle and a syringe according to any one of claims 1 to 10, characterized in that: the back end of the needle base is integrally and fixedly connected with the injection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281605.2A CN113101463B (en) | 2021-03-16 | 2021-03-16 | Puncture-proof injection needle and injector comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281605.2A CN113101463B (en) | 2021-03-16 | 2021-03-16 | Puncture-proof injection needle and injector comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113101463A true CN113101463A (en) | 2021-07-13 |
| CN113101463B CN113101463B (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110281605.2A Active CN113101463B (en) | 2021-03-16 | 2021-03-16 | Puncture-proof injection needle and injector comprising same |
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| CN110812618A (en) * | 2019-11-14 | 2020-02-21 | 湛江健力源医疗用品有限公司 | Puncture-proof injection needle with elastic sheath |
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| CN113101463B (en) | 2022-11-11 |
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Address after: No. 679 Guangyuan Road, Longtou Town, Potou District, Zhanjiang City, Guangdong Province, 524001 Patentee after: Zhanjiang Jianliyuan Medical Supplies Co.,Ltd. Address before: 524001 No.26, middle Renmin Avenue, Zhanjiang City, Guangdong Province Patentee before: ZHANJIANG JIANLIYUAN MEDICAL PRODUCTS Co.,Ltd. |
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